Eccentricity-preventing means for warpers



Feb. 6, 1923.

H., D. COLMA N. ECCENTRIGITY PREVENTING MEANS FOR WARPERS.

ORIGINAL FILED DEC.10,I91T- Patented Feb. 6, i923.

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TO BAEBEB-OOLMAN oonirnivr, rnmnois.

OF ROUKIEORID, ILLINOIS, A CORPORATION 0h EC(IBETTER/1ECITY-PREVENTINGDEEANS F013.-

Application filed December To all whom it may concern:

itknown that l, Howe in D. C LMAZQ, a citizen of the United States,residing: at Rockford, in the county of Winnebago and State of Illinois,have invented certain new and useful Improvements in Eccentricity-Preventing Means for Warpers, of which the following is a specification.

This invention relates more particularly tov wapers otthe type in whichthe warp beam is supported. and rotated through peripheral contact or"the yarn mass on the warp beam with the periphery of a driving drum, thebeam being held on the drum by means of two arms pivoted to the warperframework and engaging the trunnions oi the beam. The common method ofpressing the beam against the drum in order to obtain proper density ofthe yarn mass is to hang weights upon the before-mentioned arms tosupplement the weight or" the beam. Usually no means is provided toprevent the yarn mass from becoming eccentric, the weights abovereferred to being inefiective for this purpose. If the warper is to beoperated at high speed, it is essential that the yarn mass be preventedfrom becoming eccentric, as otherwise the bounding oi the beam willcause destructive vibration.

The object of this invention is to provide simple and effective meansfor preventing the yarn mass from becoming eccentric and to make saidmeans self-contained so that it may be readily applied to existingwarpers.

In the accompanying drawings, Figure 1 is a fragmental side elevation ofa warper showing the application thereto of a device embodying thefeatures of my invention. Fig. 2 is a front elevation of said device andFig. 3 is a side elevation thereof. Fig. 4; is a detail view of aswinging bracket comprised in the device.

In Fig. 1 is shown a portion of a war-per of ordinary construction, Abeing a rotatory drum for supporting anddriving the section beam B.

The. trunnions C 0t the beam B are engaged by the hooked ends of twoarms D which are pivoted to the framework of the warper at E. Only oneof these arms is shown in the drawings. The means for preventingeccentricity of the yarn mass comprises two devices each connected withone of the arms Since these devices are of 1917, ,erial NOfFmGAS l.Renewed April. 1.3. 1921. Serial No. 4.611%.

the same construction only one is iliustrated in the present drawings.The device comtwo interengaging parts and means ;..3r restrainingrotation of one of said parts. in the embodiment selected forillustration, the interenge ping parts consist of a rack and a pinion,the rack being detachably connected to the arm D, and the pinion beingmounted in a body which is detachahly connected to astationary part, as,for example, the floor.

The body 1 is connected to the floor at a point forward of the warperand in the plane in which the arm D swings. Preferably the body isdetachably mounted; herein it shown as provided at its lower end withoppositely extending studs 2 adapted to lie within hooks 3, said hookshaving flanges l which are secured to the floor b means of bolts 5. inthe upper end of the body is rotatably mounted shaft 6 011 which islined a pinion 7. 8 is a rack bar connected its upper end to the arm I),said rack bar meshing with the pinion T. .l.vo rollers 9 (F 3) aremounted in the upper end of the body 1 in position guide the rack bar 8and support it against the thrust oi the pinion. Adjacent to the pinion7 the rack bar fits slidably between the guide Sill'iiflCQS 10 on thebody 1.

To the upper end of the rack 8 is rigidly lined a yoke 11, the space 12of which is adapted to receive a hook or curved in F on the arm D. A.-head 18 is mounted in the yoke 11 for sliding movement longitudinally ofthe yoke. Said head is secured to a stem it having a handle 15. Anexpansion spring 16 is interposed between the head 13 and the closed endof the yoke 11. Normally the hook F holds the head 13 against the stopshoulders 17 on the yoke.

The yarn-controlled means for preventing rotation of the pinioncomprises a spur gear wheel 18 fixed to the shaft 6 and mesh ing withapinion' 19, said pinion being fixed upon a shaft 20 that is rotatablymounted in a bearing 21 upon a bracket 22.

The bracket is mounted to swing upon the axis of the shaft 6 by i'neansoi a bearing 23 surrounding said shaft. Rigid with the pinion 19 is abrake disk 2% arranged for peripheral contact with a brake shoe 25attached to a bar 26 which is fixed to the body 1. A tension spring 27is adjustably connected at one end to the body 1 and i.

attached at its other end to the bracket 22, said spring acting to pressthe brake disk 24: against the shoe 25 at all times except when theoperative separates the disk from the shoe by moving the bracket 22 bymeans of a handle 28 on the bracket. 29 is lug on said bracket arrangedto stop against a por tion of the body 1 to limit movement of thebracket 22 by the operative. The brake disk 24: is provided with a crankhandle 30.

The friction between the brake disk 24:

and the shoe 25 is such that the pinion 7' is prevented from turningexcept as required by increase in diameter of the yarn mass. As the beamfills, the pull exerted upon the rack bar 8 is sufiic-ient to cause thespur-gear wheel 18, acting through the pinion 19, to move the bracket 22against the tension of the spring 27, the extent of movement of thebracket being only enough to relieve the friction between the brake diskand the shoe sufliciently so as to allow the disk to turn through a.short are. Such turning of the disk allows the rack bar 8 to rise aminute fraction of an inch. Further increase in the diameter of the yarnmass causes repetition of the action just described. When the beam. istrue and rotating rapidly, the turning movements of the brake disk mergeinto continuous rotary motion. The inertia of the parts offers so muchresistance to sudden upward movement of the arm D that if the rapidlyrevolving yarn mass were slightly eccentric the beam would I-be unableto rise when the high point of the yarn mass passed between the axes ofthe beam and the drum A, thus causing the high point of the yarn massto: be rolled down.

When the beam is to be removed from the warper, the operative raises thebracket 22 by means of the handle 28 until the stop 29 is in contactwith the framework, thus keeping the brake disk away from the brakeshoe. While thus holding the brake disk away from the shoe, the handle15 may be used to lift the rack bar 8 suliiciently to disconnect theeccentricity-preventing device from the hook F.

When an empty beam has been substituted for the full beam, the crankhandle 30 may be used in rotating the brake disk-and the connected gearsto lower the rack bar 8 until the yoke 11 has been engaged with the hookF and a suitable degree of pressure placed on the beam, the bracket 22being held up by means of the handle 28 while the brake disk is beingthus rotated.

The reason for providing a spring-pressed head 13 is this: Suppose aneccentric beam be placed in the warper with the high point of the beambetween the axis of the beam and the driving drum A, the crank handle 30being rotated to lower the rack bar until the head 13 is against thestop shoulders 1'7. When the warper is set in operation the readilyapplied to existing warpers, the yoke 11 being adapted to engage thehook F commonly provided for the suspension of weights. V y

The invention is not limited to thecon struction and arrangement hereinshown, as

various changes vmay be made within the scope of the appended claims.

it will be seen that the body 1, the rack bar 8 and the pinion 7constitute an extensible device, and that the brake 24-25 resistselongation of said device. 7

claim as my invention: 7

l. A device of the class described having, in combination, an elongatedbody, attach ing means at one end of the body, a pinion rotatablymounted upon the body near the other end thereof, a rack bar meshingwith the pinion and guided for movement longitudinally of the body,attaching means the end the rack bar which is remote from thefirst-mentioned end of the body, and means on the body for restrainingrotation of the pinion.

2. A device of the class described having, in combination, an elongatedbody, attaching means at one end of-the body, an element rotatablymounted upon the body near the other end thereof, an element engagingthe first mentioned element and vguided for movement longitudinally ofthe body, such movement causing rotation of the firstmentioned element,attaching means at the end of the second mentioned element which isremote from the first mentioned end of the body, and means on the'bodyfor restraining rotation of the first mentioned element,

8. A device of the class described having, in combination, a body, apinion rotatably mounted on the body, a rack meshing with the pinion, aspur gear wheel rigid with the pinion, a bracket pivoted on the axis ofthe spur gear wheel, a pinion rotatably, supported by the bracket andmeshing with the spur gear wheels, a brake disk connected to the lastmentionedpinion, a brake shoe rigidly mounted on the body and arrangedto be engaged by the brake disk, and a spring acting on the bracket topress the brake disk against the brake shoe;

4. A self-contained device of the class described having, incombination, a rack and a pinion meshing with each other, means fordetachably connecting the device to a warper, said means includingattaching means connected to the rack and attaching means connected tothe pinion, said two attaching means being at OPPOSltG ends of thedevice, and means for restraining rota tion of the pinion.

5. A. warper having, in combination, a framework, a driving drum mountedin the framework, an arm pivoted to the framework for supporting a beamupon the drum, an extensible device connecting said arm to a stationarypart, as the floor, and a triction brake resisting elongation of saiddevice.

6. A War-per having, in combination, a beam-supporting arm, a rack and apinion meshing with each other, one of said gear elements beingconnected to the arm and the other gear element being connected to astationary part, and yarn-controlled means for preventing rotation ofthe pinion.

7. A warper having, in combination, a framework, a beam-supporting armpivoted to the framework, a rack and apinion meshing with each other,one or" said gear ele ments being connected to the arm, a structuresupporting the other gear element and having means to detachably engagestationary part, as the floor, and a brake resisting rotation of thepinion, said brake being carried by said structure.

8. A warper having, in combination, a framework, a driving drumrotatably mounted in the framework, an arm pivoted to the framework andarranged to support a beam upon the drum, and a self-containedeccentricity-preventing device connected at its lower end to astationary part and pivotally connected at its upper end to said arm.

9. A device of the class described having, in combination, a body, apinion rotatably mounted in the body, a rack meshing with the pinion,attaching means on the rack, attaching means on the body, said twoattaching means being at opposite ends oi the device, and means on thebody for 2GF5ii1tlil ing rotation of pinion.

10. it, warper having, in combination, a framework, a driving drummounted in the framework, an arm pivoted to the framework supporting abeam upon the drum, said m having a hook at its free end, and aself-contained eccentricitypreventing device pivoted to the floor infront of the framework and having an opening to receive said hook.

A warper having, in combination, a beam-supporting arm, an extensiblevice one end of which is connected to a stationary part and the otherend of which has an opening, a spring-pressed head slidably mounted insaid opening and adapted to bear against the beam-supporting arm, andmeans for resisting elongation of said device.

12. A warper having, in combination, a beam-supporting arm, anextensible device one end of which is connected to a station ary part, aspring-pressed head movably connected to the other end of Said deviceand adapted to bear against the beam-supporting arm, means for resistingelongation of said device.

13. A warper having, in combination, a framework, a driving drumrotatably mounted in the framework, an arm pivoted to the framework andarranged to support a beam upon the drum, and an eccentricity-preven ingdevice connected at its lower end to a stationary part and yieldinglyconnected at its upper end to said arm.

14. In eccentricity-preventing means for warpers, a slidably mountedhead, a stem attached to the head, a handle connected to the stem formoving the head in one direction, and a spring acting to move the headin the opposite direction.

In testimony whereof, I have hereunto Set my hand.

HOWARD D. COLMAN.

